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Table 1 Attrition table for model development

From: Models solely using claims-based administrative data are poor predictors of rheumatoid arthritis disease activity

  Inclusion/exclusion criteria Population and encounters
1. VARA registry patients April 1, 2015 2161 Veterans,
25,464 Encounters
2. At least one valid DAS28 2063 Veterans,
19,064 Encounters
3. Study period of interest (Jan 1, 2006 to Dec 31, 2014) 2002 Veterans,
17,000 Encounters
4. Meet 365 days of enrollment criteria with ≥2 visits during baseline period 1976 Veterans with index date
5. Remove patients with cancer 1631 Veterans
6. Remove patients with transplant 1631 Veterans
7. No other autoimmune disorders 1582 Veterans
  1. VARA Veterans Affairs Rheumatoid Arthritis, Das28 28-joint disease activity score